Multi-fulcrum hooking superlift device and crane

Abstract

The invention discloses a multi-fulcrum hooking superlift device and a crane. The multi-fulcrum hooking superlift device comprises a first superlift mast, a second superlift winch, a second superlift mast, a superlift expansion oil cylinder, a superlift fixing point, a third superlift mast, a first superlift winch, a superlift derricking cylinder, a basic boom, a fixed block, a first wire rope hanging point, a boom support, a second wire rope hanging point, a first wire rope and a second wire rope. The position-adjustable wire rope hanging points are additionally arranged on the boom support and work together with the first superlift winch to tighten the added second wire rope, the positions of the first wire rope hanging point and the second wire rope hanging point are reasonably arranged, and two traction forces act together on the boom support after the wire ropes are tightened to enable the whole boom support to be reasonably stressed, so that deflection caused during hoisting of the boom support is greatly reduced, the rigidity of the boom support is improved, severe torsional deformation caused by unreasonable stress of the boom support is effectively avoided to a certain extent, and accordingly, the product performance is improved.

Description

Technical field [0001] The invention relates to a super-lifting device, in particular to a multi-pivot hook super-lifting device and a crane, belonging to the field of construction lifting equipment parts. Background technique [0002] The super lift device is a kind of construction lifting equipment component, as an indispensable important component for the performance of super large tonnage cranes. It can reduce the deflection of the boom system and increase the rigidity of the boom system. The existing products mostly use Y-type super lift The design has a structure with only a pair of steel wire rope hanging points on the boom, which increases the lifting weight to a certain extent and reduces the deflection of the boom system. As one of the most important components of cranes, the boom system determines the level of lifting performance. Now as the market wind power has higher and higher requirements for lifting performance and lifting height, the length of the boom system is...

AI Technical Summary

Problems solved by technology

At the same time, the lightweight design of the jib system will inevitably reduce the stiffness. After hoisting, the deflection of the jib system will become larger, which has seriously affected the overall lifting performance.

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